Well I am very wary of using any sort of "screen cleaner" sprays, especially since I tried that on my old 19" crt pc monitor a few years back and it took some of the anti glare coating off the screen.
So now I just use a microfibre cloth. No chemicals involved and cleans my plasma screen up a treat. Also very very good for the inside of car windscreens. My parents got me one off the internet a few years back,but I've seen them in Tesco's as well. Cheap and when dirty you just stick them in the washing machine and there good as new.
I also just bought one of those "Pledge fluffy dusters starter packs" which comes with 2 disposable dusters and the extendable handle jobbie. On offer in tescos at the moment for the bargain price of £2. As my Pany PZ85 has a really shiny surround and base it used to be a nightmare to get the dust off. But now a quick wipe with the duster and it's all good. Also works a treat on the PS3.